Get list of classes in namespace in C#

Question

I need to programmatically get a List of all the classes in a given namespace. How can I achieve this (reflection?) in C#?

How annoying when a question gets marked as a duplicate and the original is not referenced. — War, Nov 09 '14 at 15:06

score 39 · Accepted Answer · edited Apr 06 '16 at 18:04

39

var theList = Assembly.GetExecutingAssembly().GetTypes()
                      .Where(t => t.Namespace == "your.name.space")
                      .ToList();

edited Apr 06 '16 at 18:04

Wai Ha Lee

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answered Dec 02 '09 at 20:50

Klaus Byskov Pedersen

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There's always the "one-liners". ;-) – Wim Dec 02 '09 at 20:56
1

Yeah, you gotta love a one-liner :-) – Klaus Byskov Pedersen Dec 02 '09 at 21:02
3

This assumes the whole namespace is in the current assembly, A partial solution at best. – War Nov 09 '14 at 15:03
1

War, what would be a better solution then? – Warren LaFrance Feb 07 '17 at 18:07

Wim · Answer 2 · 2009-12-02T20:51:34.290

5

Without LINQ:

Try:

Type[] types = Assembly.GetExecutingAssembly().GetTypes();
List<Type> myTypes = new List<Type>();
foreach (Type t in types)
{
  if (t.Namespace=="My.Fancy.Namespace")
    myTypes.Add(t);
}

edited Dec 02 '09 at 20:51

answered Dec 02 '09 at 20:45

Wim

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Assembly.GetExecutingAssembly().GetTypes().ToList() will give you the list you want. – Gregory Dec 02 '09 at 20:51
Yes Greg, though technically, that is using a LINQ extension method and my example was meant to show this without having .NET 3.5 – Wim Dec 02 '09 at 20:55
clean non linq example though OP doesn't say that the assembly has already been loaded so the code might return an empty set eventhough the list should have been long and a name space might be in more assemblies :) – Rune FS Dec 02 '09 at 21:06
Fair point, I should have just created a method with an Assembly parameter as input and left the client call up to the OP altogether. ;-) – Wim Dec 02 '09 at 21:43
Same namespaces in more assemblies is not how I would design it. Fine for base namespaces, but I definitely wouldn't have types in the same namespaces spread out over multiple assemblies. That's nasty. – Wim Dec 02 '09 at 21:45

score 2 · Answer 3 · edited May 23 '17 at 12:26

2

Take a look at this How to get all classes within namespace? the answer provided returns an array of Type[] you can modify this easily to return List

edited May 23 '17 at 12:26

Community

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answered Dec 02 '09 at 20:50

score 1 · Answer 4 · answered Dec 02 '09 at 20:50

I can only think of looping through types in an assebly to find ones iin the correct namespace

public List<Type> GetList()
        {
            List<Type> types = new List<Type>();
            var assembly = Assembly.GetExecutingAssembly();
            foreach (var type in assembly .GetTypes())
            {
                if (type.Namespace == "Namespace")
                {
                    types.Add(type);
                }
            }
            return types;
        }

Get list of classes in namespace in C#

4 Answers4

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